Carolyn Keene

Nancy Drew has to find the mysterious ghost that seems to be haunting Twin Elms, and make sure no more prized possessions disappear under her nose.

When Nancy, Bess, and George work as camp counselors for a week at Camp Cedarbark, an old ghost story seems to come to life when strange things start happening to campers. Nancy investigates to uncover the truth and keep her campers safe.

Nancy Drew investigates the doping of a prize horse that belongs to Ned's friend, Payton Evans, who competes in horse shows.

Nancy goes undercover at the exclusive Green Club when George's cousin, a candidate for city council, is targeted by a mysterious saboteur who threatens the plans to build a new sports complex.

Nancy's classmate, Willa, needs her help. Willa is convinced something is terribly wrong with her friend Izzy, but everyone has dismissed Willa's concerns, saying it's just teen angst. But Willa thinks it's more than that; she thinks Izzy is possessed.

Nancy, Bess, and George are on an Alaskan cruise when things start to go awry.

Nancy Drew investigates when a doll goes missing at a sleepover party.

Blue bells will be singing horses! This strange message, attached to the leg of a wounded homing pigeon, involves Nancy Drew in a dangerous mission. Somewhere an elderly woman is being held prisoner in a mansion, and  Nancy is determined to find and free her. Meanwhile, the young detective’s close friend, Helen, begs her to solve a second mystery. Helen’s grandparents, the Cornings, are frightened by a sinister wheel of blue fire...

A bottle of perfume and a secret code lead Nancy Drew and her companions to investigate the mystery surrounding Red Gate Farm and a counterfeiting ring operating nearby.

"Nancy's Alaskan adventure continues as she, Bess, and George disembark the mystery-plagued Arctic Star cruise ship and explore the grand sites of the forty-ninth state: Skagway; the Yukon territory, and Denali National Park. It's spectacular scenery, but things start to go wrong almost immediately, leading Nancy to believe that whoever was behind the unsolved mayhem aboard the ship has followed them onto dry land. The girl detectives had better watch...